Chuck.



D. WEIR.

CHUCK.

APPLICATION FILED APR. 3. 1917.

Patented Dec. 17, 1918.

IIItIIIiIIQ 5 1 i IHIJUHWIMK ATTORNEY.

invrrnn STATES Parana carton.

DAVID WEIR, OF HARTFORD, CONNECTICUT, ASSIGNCR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE HARTFORD SPECIAL MACHINERY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

CHUCK.

Specification of Letters Patent.

ifatented Dec. 17, 1918.

Application filed April 3, 1917. Serial No. 159,408.

To all 10/10/11. l l may concern:

Be it known that I, DAVID Wain, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Coni'zecticut, have invented a new and useful Improvement in Chucks, of which the following is a specification.

My invention. relates more especially to that class of chucks known as drill chucks, and an object of my invention, among others is to provide a chuck that shall be simple in its construction and particularly efficient in its method of operation.

One form of chuck embodying my invention and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which:

Figure 1 is a. view in section through the actuating sleeve of a drill chuck embodying in y invention and with parts broken away to show construction.

Fig. 2 is a view in side elevation of my improved chuck with the lower part broken away to show construction.

Fig. 3 is a view in cross section on plane denoted by dotted line 3--3 of Fig. 1.

In the accompanying drawings the nu Ineral 5 indicates the lower end of a drill spindle and 6 a chuck body having a recess within which the spindle is frictionally held in a manner common to devices of this class.

A head 7 is formed at the lower end oftlie chuck body and is provided with jaw slots 8 and a sleeve 9 that fits the tapered outer surface of the head to inclose and cover said slots. Chuck jaws 10 are located within these slots and bear against the tapered inner surface of the sleeve 9 in their closing movement, in a manner common to devices of this kind. An actuating plate 11 has a central opening, screw threaded to fit the screw threaded upper end of the chuck body, said plate being located within and secured to the upper end of an actuating sleeve 12 comprising the greater part of the outer surface of the chuck, the lower end of which sleeve is secured to the tapered sleeve 9 as by interengaging screw threads. A supporting neck 13 projects downwardly from the inner surface of the plate 11 and surrounds the upper end of the chuck body. A carrier actuator 14, of spiral form, is seated against the plate 11 and surrounds the neck 13, one end of said actuator having 1!, lug 21 projecting within the plate 11 to which it is securely fastened.

A carrier 15 is mounted to slide upon the chuck body, as shown in ig. 2 oi the draw urge, said carrier having a flange 16 projecting for a. considerable distance away from the carrier. A carrier support 1'3 is secured to the carrier, this support being also of spiral form and it is seated against the carrier 15 and closely encircles the flange 16 that acts as a support for said actuator, the end of which preferably does not extend a great distance beyond the end of said flange. The end of this support. has a lug 22 that projects into an opening in the carrier and is securely fastened therein as by means of a screw passing from the opposite side of the carrier into a threaded opening in the support, the manner of fastening both the actuator and the support being alike. The pitch of the spiral of this support is substantially the same as that of the actuator 14:, the parts being so arranged that said actuator and support 17 will each rest and move within the spaces between the turns of the other member, and as shown in Fig. 1 of the drawings, the parts being so arranged that they will not be disengaged.

The flange 16, it will be seen, forms a support for both the actuator l t and the support 17 at the points where they interengage one with the other, and the actuator and support closely interineshing, each supports the other and together they comprise a firm, positive connection, and at the same time a more or less yielding connection be tween the plate 11 and the carrier 15.

Radially extending recesses 18 in the carrier receive balls 20 loosely fitting recesses in the upper ends of the chuck jaws 10, that extend through slots 1.9 into said recesses, and by means of which the jaws are secured to the carrier.

It will readily be seen that rotation of the sleeve 12 will move the carrier along the chuck body 6 and operate the jaws 10, that are opened and closed by acting against the tapered inner surface of the sleeve 9 in a manner that will be readily understood, and as set forth in my patent dated May 8, 1917, No. 1,225,089, and to which patentreference is hereby made for such understanding of the construction and operation of such parts as may not he gained herel rom, the invention herein disclosed being an improvement on the device shown in my said patent;

The actuator i l and support 17 are each provided with flat seats 2324L that rest respectively against the plate 11 and carrier 15, andsaid actuator and support. are preferably formed flat to seat against the said plate or carrier whenever the sleeve 12 is turned sufficiently to cause said parts to touch one another.-

The screws'25 may engage with anyv desired part of the end of the actuator or C2LIIl61',bul3 substantially the point of engagement herein shown is preferred.

In accordance with the provisions of the patent statutes, I have described the principles of operation of my invention, together with the device which I now consider to represent the best embodiment thereof;

but I desire to have it understood that the carrier, each of said members being located and moving'within the space between the turns of the other member.

3. A carrier, an actuating plate, aneck projecting from one oi said members, a chuck body on which said carrier and plate are'inount'ed, means for actuating the plate, and two members of spiral form connecting said plate and carrier, each oi. said members beinglocated and moving within the space between the turns of the other member and one or" said members being supported by said neck.

ti carrier, an actuating plate, a neck projecting from one of said members, a

chuck body on which said carrier and plate are mounted, and two members of spiral form connecting said plate and carr1er, each of said members being located and moving within the space between the turns of the other member and one of said spirally arranged members inc-losing said neck and projecting beyond the end thereof. 5

5. A carrier, an actuating plate, a neck projecting fromone of said members, a chuck body on which said carrier and plate are mounted, means for actuating the plate, a member oi spiral form inclosing said neck, and a member of spiral form secured to and projecting from the carrier and with its end projecting into and movingwithin the space between the turns of the other member of spiral form and adapted to be supported by said neck.

'6. A carrier, an actuating plate, a neck pro ecting from one of said members, a chuck body on which said. carrier and plate are mounted, an actuating sleeve inclosing the chuck mechanism and secured to said plate, a member of spiral form surrounding said neck ecured to said plate, and a member of spiral form secured to and projecting from said carrier and with its turns intermeshing within the space between the turns of the other member of spiral form and adapted to e supported by said neck.

7. A carrier, an actuating plate, a neck projecting from one of said members, a chuck body 'on which said carrier and plat-c are mounted, an actuating member ofspu'al form supported by-saidneck, a supporting,

member'of spiral-formsecured to the carrier and adapted to extend onto and besup ported by the neck and having its turns extending into thespace between the turns of said actuating member, and an actuating sleeve secured'to said plate. a

8. A chuck body, a carrierslidably mounted on said body,'an actuating sleeve, an tuator rigidly connected i h sleeve andextendinginaspiral path within said sleeve, and'a support rigidly connected with said carrier and'extending in a spiral path into the space between the turns of said actuator and engagingthe same ondiamet' rically opposite sides thereof.

' DAVID WEIR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Weshingtcn, 53. 

